<!DOCTYPE HTML>
<html lang="en-US">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style type="text/css">
        .wrap {
            width: 500px;
            margin: 10px auto;
            padding: 10px;
            border: 1px solid #000;
        }

        .wrap {
            background-color: #f66;
        }
        /*for single ie7 */
        .wrap {
            /*+background-color: #6f6;*/
        }
        /*for single ie6 */
        .wrap {
            _background-color: #6f0;
        }
        /*for both ie6 & ie7 */
        .wrap {
            *background-color: #000;
        }
    </style>
</head>
<body>
<div class="wrap">
    If the background color of this paragraph is green (a darker green than this page's background)
    then the
    hack was applied.
</div>
</body>
</html>